This is a fix when using the TUI `forked process-task-runner`. The
`SIGINT` and other signals are not handled, which causes the underlying
process (in this case `run-executor`) to be left hanging.
## Current Behavior
TUI leaves processes hanging when using `forked-process-task-runner`
## Expected Behavior
TUI should kill processes
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## Related Issue(s)
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merged. -->
Fixes #
aa92b3361c